Infinitely variable cone disk-wrapping vee belt drive for driving a motorcycle

Abstract

The infinitely variable cone disk-wrapping vee belt drive comprises a pair of coaxial cone disks defining between them a vee-shaped groove and comprising an axially fixed, first cone disk and a second cone disk, which is axially displaceable relative to said first cone disk. A vee belt is trained around said first and second cone disks in said vee-shaped groove. First spring means urge said second cone disk axially toward said first cone disk. Locking means are provided, which are non-rotatably connected to one of said cone disks and movable to a locking position, in which said locking means hold said second cone disk against an axial displacement. Second spring means are provided, which urge said locking means to said locking position. Said locking means are arranged to unlock said second cone disk in response to a centrifugal force acting on said locking means and overcoming the force of said second spring means.

What is claimed is: 
     
       1. An infinitely variable cone disk-wrapping V-belt drive for a motorcycle, comprising (a) a pair of coaxial cone disks defining between them a V-shaped groove and comprising an axially fixed, first cone disk including a first hub, a second cone disk axially displaceable relative to said first cone disk and including a second hub surrounded by said first hub, the second hub defining a peripheral recess,   (b) a V-belt trained around said first and second cone disks in said V-shaped groove,   (c) first spring means urging said second cone disk axially towards said first cone disk,   (d) locking means including a locking member non-rotatably connected to, and extending radially through, said first hub, the locking member being radially slidably mounted in said first hub and constituting a flyweight adapted to extend into the peripheral recess to hold said second hub locked against axial displacement, and the first hub being integrally formed with an eyelet diametrically opposite to said locking member,   (e) second spring means including an annular spring spaced around said first hub and having end portions hooked into said eyelet, the annular spring urging said locking member into the locking position, and   (f) the locking means being arranged to unlock said second cone disk in response to a centrifugal force acting on said locking means and overcoming the force of said annular spring.   
     
     
       2. The drive set forth in claim 1, wherein said peripheral recess subtends a larger central angle than said locking member. 
     
     
       3. The drive set forth in claim 1, wherein two limit stops are disposed on opposite sides of said locking member and arranged to limit the excursion of said annular spring. 
     
     
       4. The drive set forth in claim 1, wherein said locking member has a peripheral groove which receives said annular spring.